<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区 -->
      <div class="avatar_box">
        <img src="~@/assets/logo.png" alt="avatar"/>
      </div>
      <!-- 输入框区 -->
      <el-form
          ref="loginFormRef"
          :model="loginForm"
          :rules="loginFormRules"
          label-width="0px"
          class="login_form"
      >
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password"></el-input>
        </el-form-item>
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>

  </div>
</template>

<script>
import { Message } from 'element-ui'

export default {
  name: 'Login',
  data() {
    return {
      //表单的数据绑定对象
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      //表单的验证规则对象
      loginFormRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    resetLoginForm() {
      //this指向当前组件
      // console.log(this);
      this.$refs.loginFormRef.resetFields()
    },
    login() {
      this.$refs.loginFormRef.validate(async (valid) => {
        if (!valid) return
        const { data: result } = await this.$http.post('/login', this.loginForm)
        if (result.meta.status !== 200) return Message({ message: '用户名或密码错误,请重新输入', type: 'error' })
        this.$message.success('登录成功')
        //保存token
        window.sessionStorage.setItem('token', result.data.token)
        this.$router.push('/home')
        // let loginLoading = Loading.service({ fullscreen: true, text: '登陆中请稍后' })
        // setTimeout(() => {
        //   this.$nextTick(() => { // 以服务的方式调用的 Loading 需要异步关闭
        //     loginLoading.close()
        //   })
        // }, 500)
      })
    }
  }
}
</script>

<style scoped>
  .login_container {
    background-color: #2b4b6b;
    height: 100%;
  }

  .login_container .login_box {
    width: 450px;
    height: 360px;
    background-color: #fff;
    border-radius: 3px;
    /*放到页面中间*/
    position: absolute;
    left: 50%;
    top: 50%;
    -webkit-transform: translate(-50%, -50%);
    background-color: #fff;
  }

  .login_box .avatar_box {
    width: 130px;
    height: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;

  }

  .login_box .avatar_box img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: #eee;
  }

  .login_form .btns {
    display: flex;
    justify-content: flex-end;
  }

  .login_form {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
  }
</style>